For more than two decades in agriculture, synthetic biological preparations based on natural toxins have been successfully used. One of them is the Strobi fungicide. Instructions for use characterize it as a universal remedy in the fight against fungal microflora.
The active substance of the drug is created on the basis of strobilurins - derivatives of betamethoxyacrylic acid isolated from the family of common mushrooms. The mechanism of their action is to suppress mitochondrial respiration of pathogen cells by blocking the synthesis of ATP and is most intensely manifested in the early stages of infection, preventing the growth of mycelium and further sporulation.
Description of the fungicide
Strobes can be used to protect:
- fruit trees;
- ornamental and berry bushes;
- vegetable crops;
- different types of flowers.
The effectiveness of the drug is due to the ability of strobilurins to interact with the surface layer of leaves and other parts of the plant and penetrate into their internal tissues. Fungicide Strobi not only suppresses the action of fungal pathogens, but also prevents the formation of secondary spores, which is very important for diseases such as scab.
Fungicides based on strobilurins do not accumulate in soil and water bodies, as they are quickly destroyed. For example, when determining the residual amounts of Strobi in apples, its content turned out to be very small, and in cereals it was not found at all. Strobi has low toxicity for living organisms, which is its main advantage and, at the same time, a disadvantage. Mushrooms mutate quickly and become resistant to the action of the drug. Drug resistance has been noted, for example:
- powdery mildew of cereals and cucumber;
- gray rot in greenhouses on vegetables.
The first drugs based on strobilurins appeared in the mid-90s and since then sales volumes have only increased. Among the analogs of Strobi, Trichodermin, Topsin M, Prestige and others can be distinguished. The commercial form of the drug Strobi, as evidenced by the instructions for use, is presented in the form of granules, packaged in small sachets weighing 2 g each. In online stores you can find 10 and 200 gram packs. Convenient packaging and reasonable prices make the product available to a wide range of consumers. The shelf life of the drug is 5 years from the date of manufacture. The granules dissolve perfectly in water and do not clog the sprayer.
The greatest activity of the working solution appears immediately after preparation, which should be taken into account when using it. The amount of substance used depends on:
- from the type of cultivated crop;
- approximate area to be sprayed.
Important! When using the drug Strobi, you must strictly follow the instructions.
Benefits of the drug
Instructions for use and reviews of gardeners and gardeners testify to the undoubted advantages of the Strobi fungicide:
- it can be applied during the flowering period;
- due to the ability to be evenly distributed over the surface of the leaf blade, Strobe is effective even with a partial hit;
- spraying with the drug can be carried out on wet leaves, at temperatures from +1 degrees;
- the protective effect lasts for a long time - up to 6 weeks;
- for processing small enough volumes of the drug;
- due to rapid hydrolysis, they do not accumulate in fruits;
- do not have a negative chronic effect;
- rapidly decomposing, they do not have a polluting effect on the environment.
Strobe has a wide range of action and can be used against:
- different forms of spotting;
- late blight;
- powdery mildew;
- varieties of rot;
- gray mold.
Strobi, as indicated in the instructions for use for grapes, is one of the safest fungicides. It effectively treats vines already affected by a pathogenic fungus, inhibiting mycelium growth and further sporulation. Due to this, the disease does not cover large areas of the vineyard. In parallel, protection against the possible action of other pathogens is provided.
Instructions for use advise to spray during the growing season, but no more than 2 times for the entire season and no later than a month before the grape harvest. The spray solution is prepared from the ratio of 2 g of the substance to 6 liters of water.
In order for the preparation for processing plants to give the best effect, some recommendations should be taken into account:
- morning and evening times are most optimal for treatments;
- although the drug is low-toxic, chemical protection should be used during work;
- after the end of spraying, work clothes must be kept in a soapy solution;
- it is better to choose a calm day for processing;
- after spraying for three days, gardening is not recommended;
- frequent use of Strobi can lead to the development of resistance of pathogens to the drug;
- each spraying with Strobi must be preceded by a treatment with another fungicide that is not included in this class of chemical compounds;
- treatment should concern not only parts of the plant - leaves, trunks, fruits, but also the root zone.
The practice of many years of use of Strobi and reviews allowed us to develop recommendations, the implementation of which will help prevent or reduce the emergence of resistance to these drugs:
- spraying should be carried out no later than a week after rains provoking a fungal infection;
- follow the rules of crop rotation;
- use high-quality seed material for planting.
With the help of Strobi, flowers protect against diseases such as powdery mildew and rust. Spraying is carried out every 10 days with a solution containing 5 g of the substance per bucket of water. For garden roses, the schedule of treatments with Strobi solution shifts slightly - they are sprayed once every two weeks, and also before being covered for the winter.
Important! Rose bushes need to be sprayed thoroughly, including the circle around the stamp.
Flowers affected by a fungal disease must be treated with a complex of fungicides, combining Strobi with other means, for example, with Topaz. It is also necessary to alternate spraying with Strobi solutions with fungicides that have a different mechanism of action to prevent resistance. In the second year of processing, Strobe should be removed.
For spraying vegetables, a solution is prepared at the rate of 2 g of the drug per 10 liters of water. Strobe is effective:
- when powdery mildew or late blight appears in tomatoes;
- brown spot in carrots and peppers;
- peronosporosis - in cucumbers, garlic and onions.
Instructions for use recommend spraying cucumbers and other vegetables with Strobi fungicide during the growing season with other preparations. The next year, they change the place of planting vegetables. After the last treatment of the season, before the harvest of cucumbers and tomatoes, there must be:
- on open beds - up to 10 days;
- in greenhouses from 2 to 5 days.
The main problem with fruit trees is scab and powdery mildew. The action of the Strobi drug against these pathologies is to inhibit the process of spore germination. At the same time, other fungal diseases are prevented, for example, various types of rot. When treating scab on apple and pear trees, there is such an interesting effect as planting foliage.
According to the instructions, a solution of the Strobi fungicide is prepared in the usual proportion of 2 g per bucket of water. Spraying is carried out no more than three times during the growing season and in alternation with other drugs. At least 25 days must elapse from the day of the last treatment to harvest.
The drug Strobi has long been popular among summer residents and gardeners. This is evidenced by their positive reviews.
Kruglova Maria, 49 years old, Nizhnekamsk
I really like to grow flowers. Different varieties of roses bloom on the flowerbed throughout the season. Last year they were very badly affected by powdery mildew. I already thought that they would die. Rescued advice from a friend. Before sheltering for the winter, according to the instructions for use, she treated with Strobi. In the spring my roses were healthy.
Paslenov Victor, 70 years old, Tambov
I am engaged in growing vegetables in a greenhouse. I have been using Strobi for a long time. It copes well with late blight of tomatoes. I act according to the instructions, alternating Strobi with other fungicides. Sometimes it is necessary to carry out several sprays. The main thing is to follow the instructions that come with the package.
Grushevskaya Love, 57 years old, Astrakhan
We have a small orchard. We applied Strobi fungicide to sprinkle apples and pears. I liked the drug very much - it acts quickly and with a good effect. Increases foliage greenness. It is important to follow the instructions - the number of sprays should not exceed 3 times a season.
Ogurtsov Gennady, 62 years old, Kursk
The grapes require attention and careful care. Without regular treatments, it will not produce crops and will die. However, the drugs need to be changed periodically, as the mutation of pathogenic microorganisms occurs, and they no longer respond to it. Therefore, it is necessary to periodically change the fungicides. Recently I have been using Strobi. As noted in the instructions for use, and also, according to wine growers, it is not only effective against many fungal diseases, but also safe for the environment.
If all the requirements of the instructions for the use of the Strobi fungicide are strictly followed, then both the safety of the plants and their rich harvest will be ensured.